Pet water fountain



FIG. 1 is a front elevational view of a pet water fountain showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a perspective view thereof.

The appearance of the rear of the pet water fountain is omitted and forms no part of the claimed design. 

CLAIM The ornamental design for a pet water fountain, as shown and described. 